Strip of material for forming cartridge-shells.



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Maw 66% I E. C. BELL & R. 8. CASE. STRIP 0F MATERIAL FOR FORMING CARTRIDGE SHELLS. APPLICATION FILED AUG-15.1Ql4.

LQWfiMQ Patented N0v.28,1916.

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I STRIP OF MATERIAL FOR FORMING CARTRIDGE-SHELLS.

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Specification of Letters Patent.

Patented names, mic.

Application filed August 15, 1914. Serial n6. 856,977.

To all whom it may concern Be it known that we, EDWARD C. BELL and RAYMOND S. CASE, each a citizen of the United States, residing at Unionville, in the .county of Hartford and State of Connecticut, have invented a new and Improved Strip of Material for Forming Cartridge- Shell-s, of which the following is a specification.

()ur invention relates to the formation of tubes from which cartridge shells are made, and an object of our invention, among others, is to provide a strip of material having such characteristics as to enable a shell of superior qualityto be produced in a particularlyefficient manner.

One formof strip embodying our'inven- I tion and in the construction and use of which theiobjects herein 'set out, as well as others, may be attained, is illustrated in the accompanying drawings, in which- Figure 1 is a face View of a strip of material embodying our invention. Fig. 2 is a view in section through-the same, the thickness being exaggerated :,to illustrate the invention and the water-proof coating being indicated by a thick black line.

In the making of paper shells employed to hold a charge of powde, a tube is generally formed and is then' cht up into pieces of the proper length to form the shells which are supplied with caps and other devices to complete the shell.

It is desirable that the inner surface of the completed shells shall be coated with a material, as paraflin, which while objectionable to a certain degree is of particular and the greater advantage in that it prevents the inner surface of the shell from being scorched or burned when the powder is ignited. This paraflin may be'applied in the simplest and most eficient manner, by dipping the shells in baths of melted paraffin. It is observed that this dipping process will treat the outside as well as the mside of the shell, and While it is essential that the outside of the shell shall be water-proof to prevent it from being detrimentally affected b changes in atmospheric conditions, it is inadvisable to use paraflin for this purpose, for the reason that it injures the fibers of the paper to a certaindegree. The advantages of the paraffin are such as to require its use on the inner surface of the shell and it therefore becomes imperative of the shell.

shells, which tube or shells may be dipped in melted paraffin and the latter will come in contact with the paper only on the inner surface where its presence is practically required. Y

In the accompanying drawings the numeral 5 denotes a strip of paper or similar material that is of a width equal to the length of the tube to be produced therefrom. The edge 6 of this paper is treated with a water-proofing material, to an extent equal to or slightlygreater than the circumference of the tube to be finally produced from the strip, so that the entire outer surface of the tube will consist of this water-proofed material. In many instances it is desirable to have the shells colored and in such cases coloring material may be mixed with the Water-proofing material or separately applied to the paper, tlie colored portion being coextensive with the water-proofed portion.

This strip now possesses such qualities that from being scorched or burned in the dis-' charge. of the explosives therein. The water-proofing material thus protects the outer surface of the shell from any in u- .rious efiects of the parafiin and when the coloring materialis applied in the waterproofing, this material also prevents the the hot. moist paraffin.

We claim- 1. A strip of material for the production. of tubes to-be formed into cartridge shells, said strip having its edge treated with a protective coating'to prevent contact of paraffin therewith, said coating extending adlstance equal to the circumference of a tube to be I formed from said strip.

2. A strip of material for the production color from running under the influence of of tubes to be formed into cartridge shells, said strip being of a Width to produce a shell of several plies, said strip being in its natural state from one edge to such distance from the opposite edge as will comprise a margin equal to the circumference of the shell, such margin being treated with col- 

